Where do you go to learn how to make ice cream?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must Birbal buy to silence Akbar?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

You need to arrange three 7 and mathematical symbols to form number 1?

If eleven plus two equals one, what does nine plus five equal?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

Solve this riddle by finding the odd one out from the rest.